button.ordina-campione-btn { /* <-- UNICA MODIFICA QUI */
    display: block;
    width: 100%;
    background-color: #ffba00;
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 12px 30px;
    font-size: 16px;
    text-transform: uppercase;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s;
    box-sizing: border-box;
}

button.ordina-campione-btn:hover {
    background-color: #ffa500;
}

/* Aggiunta per lo stato di caricamento */
button.ordina-campione-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

.sample-custom-message {
    text-align: center;
    font-size: 14px;
    margin-top: 10px;
    color: #666;
}